PMID: 11311351Apr 20, 2001Paper

Optimisation and standardisation of a method for detecting and enumerating bacteriophages infecting Bacteroides fragilis

Journal of Virological Methods
R AraujoJuan Jofre

Abstract

A method for the detection and enumeration of bacteriophages infecting Bacteroides fragilis has been standardised. The recommended host strain is RYC2056 (ATCC 700786) because of the relatively high counts (10(4)-10(5) PFU/100ml) that it recovers in sewage from very different geographical areas. The addition of 0.25% bile to the culture and assay media and the manipulation of the host strain under strict anaerobic conditions resulted in a significant increase (more than 100%) in the number of phages detected. No other changes in the media and culture conditions resulted in changes in the phage counts detected. However, these increases do not justify changing the culture conditions and media described, taking into consideration that bile renders the media cloudy making it difficult to follow the host growth and that most laboratories do not have the facilities to work under strict anaerobic conditions. Nalidixic acid (100 microg/ml) and kanamycin (100 microg/ml) in the assay medium significantly reduce the background flora from polluted samples without affecting the phage counts. Freezing cultures just before the end of the log-phage growth at (-70+/-10) degrees C with BSA-sucrose as cryoprotector, storing of 1-2 ml in glass via...Continue Reading

Citations

Oct 12, 2012·Environmental Science and Pollution Research International·Arnau Casanovas-Massana, Anicet R Blanch
Sep 21, 2000·Journal of Virological Methods·I Muniain-MujikaF Lucena
May 15, 2002·Journal of Virological Methods·Kirsten A MooijmanArie H Havelaar
Apr 2, 2003·Journal of Virological Methods·L Mocé-LlivinaM Muniesa
Apr 4, 2003·International Journal of Food Microbiology·I Muniain-MujikaR Girones
Nov 24, 2011·Environmental Science & Technology·James E EbdonHuw D Taylor
Feb 19, 2002·Journal of Applied Microbiology·A E DuránJ Jofre
Aug 20, 2008·Virology Journal·Shawn A HawkinsGary S Sayler
Mar 4, 2014·Water Research·Joan JofreMaite Muniesa
Feb 26, 2009·Journal of Applied Microbiology·A Letarov, E Kulikov
Nov 16, 2004·Journal of Virological Methods·Matthew R OlsonRandall E Hicks

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